Mathematician:Hugh Cowie Williams

Mathematician

Canadian mathematician working mainly in number theory and cryptography.

Discovered the prime nature of the repunit $R_{317}$ in $1978$.

Nationality

Canadian

History

• Born: July 23, 1943 in London, Ontario, Canada

Theorems and Definitions

• Titanic Prime whose Digits are all 9 except for one 1

Publications

• 1965: Solution of the Cattle Problem of Archimedes (Math. Comp. Vol. 19: pp. 671 – 674) (with R.A. German and C.R. Zarnke)  www.jstor.org/stable/2003954

• 1981: The Problem of Sierpiński Concerning $k \cdot 2^n + 1$ (Math. Comp. Vol. 37: pp. 229 – 231) (with Robert Baillie and G. Cormack)  www.jstor.org/stable/2007516

• 1985: Some Periodic Continued Fractions With Long Periods (Math. Comp. Vol. 44, no. 170: pp. 523 – 532) (with C.D. Patterson)  www.jstor.org/stable/2007971

• 1986: The Primality of $R1031$ (Math. Comp. Vol. 47: pp. 703 – 711) (with Harvey Dubner)  www.jstor.org/stable/2008184